| 373 |
|
if (dta == NULL) { /* free all if NULL */ |
| 374 |
|
hval = 0; nents = TABSIZ; |
| 375 |
|
} else { |
| 376 |
+ |
if (dta->next == dta) { |
| 377 |
+ |
free(dta); /* unlisted temp array */ |
| 378 |
+ |
return; |
| 379 |
+ |
} |
| 380 |
|
hval = hash(dta->name); nents = 1; |
| 381 |
|
if (!*dta->name) { /* not a data file? */ |
| 382 |
|
dta->next = dtab[hval]; |
| 560 |
|
sizeof(DATATYPE)*dp->dim[dp->nd-1].ne); |
| 561 |
|
if (newdp == NULL) |
| 562 |
|
error(SYSTEM, "out of memory in datavector"); |
| 563 |
< |
newdp->next = NULL; |
| 563 |
> |
newdp->next = newdp; /* flags us as temp vector */ |
| 564 |
|
newdp->name = dp->name; |
| 565 |
|
newdp->type = DATATY; |
| 566 |
|
newdp->nd = 1; /* vector data goes here */ |
| 573 |
|
return(newdp); /* will be free'd using free() */ |
| 574 |
|
} |
| 575 |
|
|
| 572 |
– |
|
| 573 |
– |
#if 0 |
| 574 |
– |
double |
| 575 |
– |
datavalue( /* interpolate data value at a point */ |
| 576 |
– |
DATARRAY *dp, |
| 577 |
– |
double *pt |
| 578 |
– |
) |
| 579 |
– |
{ |
| 580 |
– |
DATARRAY sd; |
| 581 |
– |
int asize; |
| 582 |
– |
int lower, upper; |
| 583 |
– |
int i; |
| 584 |
– |
double x, y0, y1; |
| 585 |
– |
/* set up dimensions for recursion */ |
| 586 |
– |
if (dp->nd > 1) { |
| 587 |
– |
sd.name = dp->name; |
| 588 |
– |
sd.type = dp->type; |
| 589 |
– |
sd.nd = dp->nd - 1; |
| 590 |
– |
asize = 1; |
| 591 |
– |
for (i = 0; i < sd.nd; i++) { |
| 592 |
– |
sd.dim[i].org = dp->dim[i+1].org; |
| 593 |
– |
sd.dim[i].siz = dp->dim[i+1].siz; |
| 594 |
– |
sd.dim[i].p = dp->dim[i+1].p; |
| 595 |
– |
asize *= (sd.dim[i].ne = dp->dim[i+1].ne) + |
| 596 |
– |
((sd.type==SPECTY) & (i==sd.nd-1)); |
| 597 |
– |
} |
| 598 |
– |
} |
| 599 |
– |
/* get independent variable */ |
| 600 |
– |
if (dp->dim[0].p == NULL) { /* evenly spaced points */ |
| 601 |
– |
x = (pt[0] - dp->dim[0].org)/dp->dim[0].siz; |
| 602 |
– |
x *= (double)(dp->dim[0].ne - 1); |
| 603 |
– |
i = x; |
| 604 |
– |
if (i < 0) |
| 605 |
– |
i = 0; |
| 606 |
– |
else if (i > dp->dim[0].ne - 2) |
| 607 |
– |
i = dp->dim[0].ne - 2; |
| 608 |
– |
} else { /* unevenly spaced points */ |
| 609 |
– |
if (dp->dim[0].siz > 0.0) { |
| 610 |
– |
lower = 0; |
| 611 |
– |
upper = dp->dim[0].ne; |
| 612 |
– |
} else { |
| 613 |
– |
lower = dp->dim[0].ne; |
| 614 |
– |
upper = 0; |
| 615 |
– |
} |
| 616 |
– |
do { |
| 617 |
– |
i = (lower + upper) >> 1; |
| 618 |
– |
if (pt[0] >= dp->dim[0].p[i]) |
| 619 |
– |
lower = i; |
| 620 |
– |
else |
| 621 |
– |
upper = i; |
| 622 |
– |
} while (i != (lower + upper) >> 1); |
| 623 |
– |
|
| 624 |
– |
if (i > dp->dim[0].ne - 2) |
| 625 |
– |
i = dp->dim[0].ne - 2; |
| 626 |
– |
|
| 627 |
– |
x = i + (pt[0] - dp->dim[0].p[i]) / |
| 628 |
– |
(dp->dim[0].p[i+1] - dp->dim[0].p[i]); |
| 629 |
– |
} |
| 630 |
– |
/* get dependent variable */ |
| 631 |
– |
if (dp->nd > 1) { |
| 632 |
– |
if (dp->type == DATATY) { |
| 633 |
– |
sd.arr.d = dp->arr.d + i*asize; |
| 634 |
– |
y0 = datavalue(&sd, pt+1); |
| 635 |
– |
sd.arr.d += asize; |
| 636 |
– |
y1 = datavalue(&sd, pt+1); |
| 637 |
– |
} else if (dp->type == SPECTY) { |
| 638 |
– |
sd.arr.s = dp->arr.s + i*asize; |
| 639 |
– |
y0 = datavalue(&sd, pt+1); |
| 640 |
– |
sd.arr.s += asize; |
| 641 |
– |
y1 = datavalue(&sd, pt+1); |
| 642 |
– |
} else { |
| 643 |
– |
sd.arr.c = dp->arr.c + i*asize; |
| 644 |
– |
y0 = datavalue(&sd, pt+1); |
| 645 |
– |
sd.arr.c += asize; |
| 646 |
– |
y1 = datavalue(&sd, pt+1); |
| 647 |
– |
} |
| 648 |
– |
} else { |
| 649 |
– |
if (dp->type == DATATY) { |
| 650 |
– |
y0 = dp->arr.d[i]; |
| 651 |
– |
y1 = dp->arr.d[i+1]; |
| 652 |
– |
} else if (dp->type == SPECTY) { |
| 653 |
– |
if (dp->arr.s[dp->dim[0].ne]) { |
| 654 |
– |
double f = ldexp(1.0, -(COLXS+8) + |
| 655 |
– |
(int)dp->arr.s[dp->dim[0].ne]); |
| 656 |
– |
y0 = (dp->arr.s[i] + 0.5)*f; |
| 657 |
– |
y1 = (dp->arr.s[i+1] + 0.5)*f; |
| 658 |
– |
} else |
| 659 |
– |
y0 = y1 = 0.0; |
| 660 |
– |
} else { |
| 661 |
– |
y0 = colrval(dp->arr.c[i],dp->type); |
| 662 |
– |
y1 = colrval(dp->arr.c[i+1],dp->type); |
| 663 |
– |
} |
| 664 |
– |
} |
| 665 |
– |
/* |
| 666 |
– |
* Extrapolate as far as one division, then |
| 667 |
– |
* taper off harmonically to zero. |
| 668 |
– |
*/ |
| 669 |
– |
if (x > i+2) |
| 670 |
– |
return( (2*y1-y0)/(x-(i-1)) ); |
| 671 |
– |
|
| 672 |
– |
if (x < i-1) |
| 673 |
– |
return( (2*y0-y1)/(i-x) ); |
| 674 |
– |
|
| 675 |
– |
return( y0*((i+1)-x) + y1*(x-i) ); |
| 676 |
– |
} |
| 677 |
– |
#endif |
